<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }

        ::-webkit-scrollbar-track-piece {
            background-color: rgba(96, 20, 11, 0.2);
            /*background-color: rgba(0, 0, 0, 0.2);*/
            -webkit-border-radius: 60px;
        }

        ::-webkit-scrollbar-thumb:vertical {
            height: 60px;
            background-color: rgba(91, 56, 125, 0.7);
            /*background-color: rgba(125, 125, 125, 0.7);*/
            -webkit-border-radius: 60px;
        }

        ::-webkit-scrollbar-thumb:horizontal {
            width: 3px;
            background-color: rgba(125, 125, 125, 0.7);
            -webkit-border-radius: 6px;
        }
    </style>
</head>
<body>
<div>
    <p style="height: 15000px;">很长</p>

</div>
</body>
</html>